I can see it have some indicator showing that it have Cache running via mn-top in below
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Cache : 17373 + 2481Mb / 64Kb with checksums, 90343 + 11146 valid blocks [/pstorage/ssd0/client_cache]
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and fstab is configed cache
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pstorage://pcstorage /pstorage/pcstorage fuse.pstorage cache=/pstorage/ssd0/client_cache,cachesize=19855 0 0
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But not sure is it cache is active or not.